Patents by Inventor Ria Nouwen

Ria Nouwen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for fabricating ferro-electric thin films using a sol-gel technique
    Publication number: 20020008227
    Abstract: A method is disclosed for the formation of ferro-electric films using a multi coating process based on a sol-gel technique. In particular a method is disclosed to fabricate high-quality thickness scaled PZT films of an alkoxide-type liquid chemical PZT precursor solution, preferably a Pb(ZrxTi1−x)O3 precursor solution, using a sol-gel technique. At least two coated layers are deposited, but the precise number of coated layers depends on the desired thickness of the ferro-electric film. According to the method of the invention, the electrical characteristics of the film as formed are not dependent on the number of coated layers. There are a number of properties, characteristic for the method of the present invention, and resulting in said excellent electrical characteristics. In fact said method can comprise a multi coating process wherein a reduced number of coated layers is used but where intermediate crystallization steps are performed.
    Type: Application
    Filed: September 4, 2001
    Publication date: January 24, 2002
    Applicant: Interuniversitair Micro-Elektronica Centrum (IMEC vzw)
    Inventors: Dirk Wouters, Gerd Norga, Herman Maes, Ria Nouwen, Jules Mullens, Dirk Franco, Jan Yperman, Lucien C. Van Poucke
  • Method for fabricating ferro-electric thin films using a sol-gel technique
    Patent number: 6300144
    Abstract: A method is disclosed for the formation of ferro-electric films using a multi coating process based on a sol-gel technique. In particular a method is disclosed to fabricate high-quality thickness scaled PZT films of an alkoxide-type liquid chemical PZT precursor solution, preferably a Pb(ZrxTi1−x)O3 precursor solution, using a sol-gel technique. At least two coated layers are deposited, but the precise number of coated layers depends on the desired thickness of the ferro-electric film. According to the method of the invention, the electrical characteristics of the film as formed are not dependent on the number of coated layers. There are a number of properties, characteristic for the method of the present invention, and resulting in said excellent electrical characteristics. In fact said method can comprise a multi coating process wherein a reduced number of coated layers is used but where intermediate crystallization steps are performed.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: October 9, 2001
    Assignees: Interuniversitair Micro Elecktronica Centrum (IMEC yzw), Limburgs Universitair Centrum
    Inventors: Dirk Wouters, Gerd Norga, Herman Maes, Ria Nouwen, Jules Mullens, Dirk Franco, Jan Yperman, Lucien C. Van Poucke